Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8eae315045944af…

MALICIOUS

PDF

72.8 KB Created: 2021-02-28 06:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c8e3013ffe302cece07ccdaf9a44637b SHA-1: 2d5284982ea8d1ebf6c9bd8e0d2178134b2ba76f SHA-256: f8eae315045944af59f0e39e069a2149a7e9550f20d20501e30ee935e5d7f64a
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://leonvi.ru/award?keyword=honda+crf+125cc+dirt+bike+for+sale PDF link annotation
    • http://replyua.site/bullet_journal_health_tracker_ideaskyf8m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_601f5463b4064.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371498/normal_5fc6cd4089b21.pdfIn PDF document text
    • http://usacreditcheck.info/antivirus_for_windows_7_starter_freewvgqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384167/normal_5fe122b5b44e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_6010706f81f66.pdfIn PDF document text
    • http://vizionsmc.net/89848834302tumim.pdfIn PDF document text
    • http://forexgeeks.net/130824051472gzy.pdfIn PDF document text
    • http://world-wildshop.com/systemverilog_queue_find_indexisn1f.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/ieNdWjd/mini_racing_adventures_mod_apk_1._5._2.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/dO9iep3/52820045297.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikoxevogajub.epizy.com/answer_machine_beep_sound_effect.pdfIn PDF document text
    • http://wuxojawe.epizy.com/ffxv_bahamut_answers.pdfIn PDF document text
    • http://fuvelotuz.epizy.com/15548177418.pdfIn PDF document text
    • http://sivokag.epizy.com/utorrent_android_games.pdfIn PDF document text
    • http://webezivoxubabo.epizy.com/graphing_linear_inequalities_worksheet_algebra_2_answers.pdfIn PDF document text
    • http://taximupije.epizy.com/vafetavuvajadi.pdfIn PDF document text
    • http://waminakukivexo.rf.gd/41060778459.pdfIn PDF document text
    • http://vaguwiraji.rf.gd/48891067621.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B2 5488 bytes
SHA-256: 34236cb097d19878c13f879402055c48227b8762806662b3aad41d83344022d2
font_01_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 10032 bytes
SHA-256: c197b282ddf582b5a8d81da298e01de17f2a5290f3d4ef60f8a1d4f1169f0c7d